Cellulose acylate film, polarizing plate, optical compensation film, and liquid crystal display device using the same

US20090023911A1Inactive Publication Date: 2009-01-22FUJIFILM CORP
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
FUJIFILM CORP
Publication Date
2009-01-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

A cellulose acylate film characterized in that it has a shear rate dependency of melt viscosity of 0.1 to 2 and / or a temperature dependency of melt viscosity of 0.1 to 3. The cellulose acylate film is capable of suppressing generation of cutting wastage at the time of cutting.
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Description

TECHNICAL FIELD

[0001] The present invention relates to a cellulose acylate film which is formed by melting / flow casting to be suitable for an optical film, a polarizing plate, an optical compensatory film, an anti-reflection film, and a liquid crystal display device using the same.BACKGROUND ART

[0002] Heretofore, in producing cellulose acylate films for use in liquid-crystal image display devices, a solution-casting method has been principally carried out, which comprises dissolving cellulose acylate in a chlorine-containing organic solvent such as dichloromethane, casting it on a substrate, and drying it to form a film. Dichloromethane, a type of a chlorine-containing organic solvent has been favorably used as a solvent for cellulose acylate, since it is a good solvent for cellulose acylate and has a low boiling point (about 40° C.), therefore having the advantage of easy vaporization in a film formation step and in a drying step.

[0003] Recently, in terms of environment conservation, ...

Claims

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